Update README

Change-Id: I7fb8d8c5a73909ec0e356887937c5579c52b0f54
diff --git a/README.mkdn b/README.mkdn
index dbe72e0..fdbee21 100644
--- a/README.mkdn
+++ b/README.mkdn
@@ -11,7 +11,7 @@
     (Go to repo you are patching, make your changes and commit)
     cmgerrit <for(new)/changes(patch set)> <branch/change-id> 
 
-    repo start cm-12.0 .
+    repo start cm-12.1 .
     (Make your changes and commit)
     repo upload .
 Note: "." meaning current directory
@@ -31,7 +31,7 @@
 
 To initialize your local repository using the CyanogenMod trees, use a command like this:
 
-    repo init -u git://github.com/CyanogenMod/android.git -b cm-12.0
+    repo init -u git://github.com/CyanogenMod/android.git -b cm-12.1
 
 Then to sync up: